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1. #CUTLER HAMMER 150 AMP PANEL INSTALL#
2. #CUTLER HAMMER 150 AMP PANEL FULL SIZE#
3. #CUTLER HAMMER 150 AMP PANEL PORTABLE#

Eaton supposedly says tandems are now allowed in every space in every Eaton panel, and if the CTL permissive notches aren't there, use non-CTL breakers. Many say the restrictions on the labeling still apply. UL approves labeling and instructions as part of Listing the equipment.

Prior to the CTL rule nothing had notches, so to support those early panels, they never stopped making non-CTL twins which have no bar. The notch's only job is a reject feature, which matches a bar on a CTL breaker that prevents its insertion where it does not belong. The notches do nothing to stabilize the breaker. The panel interior that you pictured has CTL notches on every bus stab, so it can use CTL tandems (Eaton calls them "twins", I call them double-stuff) in every location. The CTL (Circuit Total Limitation limiting to 42 circuits/panel) rules have been abolished. If it existed, it would come up in nearly every subpanel installation. That formula you found, you didn't find it in any part of NEC that applies to residences. I'd like to only wince once, only do this one time. So I don't want to stress this panel out on step #1 if it's not made for it. Should I be looking at replacing the panel instead of testing its limits with tandem breakers? This is the start of essentially a complete rewire of the house and adding a sub panel in the garage to power some shop equipment. If I CAN do this, and my panel doesn't have any restrictive design (those little tabs) that constrains the physical slot the tandem breaker goes into, is there a preference for where to place them, like at the bottom of the panel, or does it not matter at all? If they are stabilized against other breakers so they don't 'flop around' without the tab are they okay?Īnd finally, is this panel so old that I shouldn't stress it out? It seems mechanically okay, doesn't look like it's falling apart. Tabs like on the bottom of this, random panel with tandem tabs: But I don't see the little extra tabs that the CHTs expect to stabilize them (image of the bottom of my panel, red arrow). I think that CHT is CH-Tandem, thus because the Branch Breaker CH Type column in the attached image label includes type CHT, that I am allowed to use these tandem breakers. So, can I have up to 40 (or 42) circuits in my 32 physical slots? Is something like the Eaton CHT2020CS (Type CH 20-Amp 1-Pole Tandem Circuit Breaker) going to just click in here without an issue? (AMPs * Number of Poles) / 10 = number of circuits Based on that, and using the formula that I found: So that puts in squarely into the "42" rule as best I can tell. My best guess is it's an older version of the CH32B200J Loadcenter.īased on the lack of labeling it seems to predates the Circuit Total Limitation (CTL) rules and the 2008 NEC that dropped the hard limit on slots.

#CUTLER HAMMER 150 AMP PANEL FULL SIZE#

It has a 200 AMP main breaker (CSR2200) and 32 full size breaker slots in it. I can't find a model number of any sort, like a G3040 that would mean '30 slots with 40 circuits'. The panel is of unknown age and the house is from 1926, with remnants knob and tube wiring that were still energized when I moved in. Price aside, this interlock kit is easy to install, and performs as advertised.There are other versions of this question, but as each panel is distinct it requires that I ask for this particular panel. There is no information as to whether the tie-down is "necessary", but if all the slots in your panel are full, it won't fit. The tie-down would need to mount beside the breaker, and is wide enough that would need a dedicated slot.

There is a "tie-down" which is not illustrated in the seller's photos. I did find the slot in the panel cover needed a couple passes with a file so it would clear the (now slightly wider) breaker. No tools are necessary, except a screwdriver if it's a loose fit. To install, remove the panel cover and clip the interlock over the top of the Main breaker. The pivot pin on the interlock doesn't look to be very substantial, but this is the official Eaton kit, and really the only option. The included parts probably cost less than five bucks to manufacture. The interlock kit seems quite overpriced for what you get.

#CUTLER HAMMER 150 AMP PANEL PORTABLE#

This is the cheapest and most versatile way of *legally* and *safely* backfeeding a portable generator. After installation, it prevents the Main from being on at the same time as the breaker directly below.

#CUTLER HAMMER 150 AMP PANEL INSTALL#

This interlock kit is simple to install and functions as it's supposed to.